Rain Strike and Heaven Strike inflict gun or physical damage to random targets. E.N.D. inflicts damage to random targets plus fear status ailment. Self-Denial recovers about 300 HP and increases Atk. Adaptation inflicts large damage to one target. Silent Prayer casts Dekaja and Dekunda to both allies and enemies. Power Overflow recovers 7500 HP which he'll use one time after his HP gets low.

Gore only uses physical and gun attacks, so make up a party that is resistant to them (St, Rf, or Dr physical). Spam wind-based attacks to trigger Demon COOP (it pierces Rf physical). Once Gore uses Charge, his next attack will target the MC, have MC defend the next turn or use item/magic to reflect the damage, otherwise it will be about 1000 worth of damage if he uses Adaptation. Assistant spells like Tarukaja and Rakunda are also useful.

Obtain Clement Bell (クレメントベル). > Take it back to the lab and obtain main application Unlock D (アンロックD).

The main pattern is Left Hand followed by Dark Matter. Cast all the ~nda spells to suppress the damage. In the later stage, he will no longer be weak against ice, instead he will start absorbing it. Use item/spell to dispel the bomb status promptly.

Since Mem Aleph has no weakness, focus on using -kaja and -nda spells. The elemental spells can be reflected, having some demons in the team with Rf properties would be a good idea. The MC can equip the Dragon Vest (obtained by finishing ex-mission #56), which can null fire and electricity. He can also equip the Supple Ring (石化解放リング) to deal with the Tragic Reincarnation. Have a Tetraja spell or item handy to reflect Light and Darkness. For a safer approach, use MC to defend and recover MP, one demon to cast Salvation (メシアライザー), and the remaining two members to attack.

Fire, Ice, Lightning, and Wind inflict elemental damage to all members. Darkness and Light are all-target instant death skills. Mother's Kiss inflicts 6-8 random physical attacks. Reason's Start recovers about 600 HP and nulls all buffs and debuffs. Asura Roga inflicts rage status ailment. Disaster Cycle inflicts damage to all targets plus random status ailment. Mem Aleph will determine an alignment, and all party demons with that alignment will be returned to the Demonica. Great Flood inflicts almighty damage to all targets plus decreases hit and evade rates. MA inflicts damage equal to the target's current HP (i.e. instant death), and recovers the user with the same amount.

Since this will be a consecutive battle, recover and buff up accordingly. To avoid being totally stranded by Mem Aleph, make up a party with different alignments. It'd also be good to have some demons that can use the Invitation (招来の舞踏) and Sabbatma (サバトマ), so that they can help with summoning and get the whole team up ASAP.

The properties rotate each turn, there are three patterns:

P

G

F

I

E

W

L

D

Rf

Rf

Wk

-

-

-

Nu

Nu

Rf

Wk

-

-

-

Rf

Nu

Nu

-

-

-

Rf

Rf

Wk

Nu

Nu

A sub application of MC's, Gibo Eyes (ギボアイズ), can identify the current properties.

Finally, do not use any type of reflection magical skills or items (like Makarakarn, Tetrakarn or Magic Mirror), or Mem Aleph will use MA.